The other day I was watching a film with the trope of some unpopular smart girl helping other no so smart popular girl get the boy and the boy finds it out and fall in love with the unpopular smart girl. So I thought why not that BUT instead, the girls fall for each other and the guy just befriend them, and jegulus. And now I want a fanfic.
So my thoughts were something like this:
Lily wants to write a song. She told James that she's writing a song for Marlene to Dorcas (even though the truth is she's writing it for Pandora/Mary, haven't decided yet), so it's a love song and James thinks it's the perfect excuse to tell her what he feels hidden in love lyrics. And James who is stupidly madly in love with her, tells her that he is super good with lyrics and stuff. But the truth is that he is not, so he asks the other marauders for help and they also don't know how to write lyrics, and somehow Sirius tell him that his little brother used to write loads of sad boy poems, so maybe he knows something about how to write lyrics. "Songs are poems with music, aren't they?"
So James tries to convince Regulus to help him who at first says no. Needing a good excuse (more than him been in love with James) for him to agree to help James, like a bet, a party or I don't know. Finally, Regulus accept to help him. And they start talking to each other and planning how are they going to do this, and Regulus teaching James some poetry and ahhh. They find a spell in which they can speak to each other without other people hearing them and hearing what the other is hearing (como un pinganillo de toda la vida or something like that). (I don't know the name in English, but like an earpiece to talk to each other, each in different rooms).
And with all this James goes to see Lily to help her with the song. Lily play the guitar a bit and shows James the background music that she had for the song. She asks him for suggestions for the song (a love song) and Regulus who is in other place (probably in some corner of the Slytherin common room or in his dorm) start making some beautiful love verses (or read some of his verses from his poems on his hidden journal with his secret love poems, obviously not about James) (he tries to change the pronouns and stuff like that but it's kind of easy to those because... The song Lily told James they were writing was from Marlene to Dorcas, so for Regulus both ships are similar. One Slytherin one gryffindors, James and Dorcas 's skins are dark and Marlene and Regulus are pale but maybe "we're not putting that James" "why not is not as it's not true" "yes I know but I don't know, I don't think it feets, even though the lyrics were beautiful". James talking to himself: "yes, they were, just a beautiful verses from a beautiful poet". Lily: ? Meanwhile Regulus on his dorm talking to James via spell: "shut up Potter and pay attention to what you should be doing. Okay if she doesn't think that feets maybe try with this..." James to Lily, back to reality: "Anyway, what about this instead..."
Also the quidditch rivalry, etc.
James hears the lyrics and loves them. Obviously tells Regulus all that and they continue talking and flirting and James continues helping Lily with her song and so weeks go by and James starts feeling more and more attach to Regulus and starts thinking that maybe he's not as in love with Lily as he thought, and starts he likes Regulus just a bit.
And you know it has to have drama, so in one of those James helping Lily and Regulus helping hidden in his dorm he forgets they're actually helping Lily doing her song so he let out the actual verses from one of his poems. Like: -bla bla he is bla bla (I don't know poetry), So James is like: "he?". And Regulus panics and corrects himself: "she! I meant she is bla bla".
And James being the curious and gossiper he is later would be like: "So... do you like anyone? Are those verses actually poems for the love of your life?" "no, and don't be dramatic" "you definitely like a boy! Tell me everything! Is he a Slytherin, one of your friends, or maybe he's in another house? Have you been telling us your poems?" "James just drop it, I'm not in love with anyone, I just like writing poems, okey?" "if you say so..."
We all know he didn't drop it, and he starts trying to figure out who Regulus is in love with. And mix with that he starts feeling a bit jealous of the guy who has Regulus attention and who he writes love sad poems about.